I’m not sure if this is a Rust issue, an LLVM one or an ‘I don’t know how CPUs work’ issue. I’m on
rustc 1.13.0-nightly (923bac459 2016-09-06) and if I run
rustc --print cfg I get the following
I believe this is incorrectly missing
sse4.2 (the feature I actually care about). If I dump
cpuinfo I get something like:
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 94 model name : Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz ... flags : ... sse sse2 ... ssse3 ... sse4_1 sse4_2 ... ...
Is this not meant to be supported in Rust yet, is there something I need to configure or am I misunderstanding something?